// graph-tool -- a general graph modification and manipulation thingy
//
// Copyright (C) 2006-2020 Tiago de Paula Peixoto <tiago@skewed.de>
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option) any
// later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

#include "graph_filtering.hh"
#include "graph.hh"
#include "graph_properties.hh"

#include <boost/graph/make_maximal_planar.hpp>
#include <boost/graph/make_biconnected_planar.hpp>
#include <boost/graph/boyer_myrvold_planar_test.hpp>

using namespace std;
using namespace boost;
using namespace graph_tool;

struct mark_planar_edge
{
    template <typename Graph, typename Vertex>
    void visit_vertex_pair(Vertex u, Vertex v, Graph& g)
    {
        if (!is_adjacent(u, v, g))
            add_edge(u, v, g);
    }
};

struct do_maximal_planar
{
    template <class Graph, class VertexIndex, class EdgeIndex>
    void operator()(Graph& g, VertexIndex vertex_index, EdgeIndex edge_index) const
    {

        unchecked_vector_property_map
            <vector<typename graph_traits<Graph>::edge_descriptor>, VertexIndex>
            embedding(vertex_index, num_vertices(g));
        bool is_planar = boyer_myrvold_planarity_test
            (boyer_myrvold_params::graph = g,
             boyer_myrvold_params::edge_index_map = edge_index,
             boyer_myrvold_params::embedding = embedding);

        if (!is_planar)
            throw GraphException("Graph is not planar!");

        mark_planar_edge vis;
        make_biconnected_planar(g, embedding, edge_index, vis);
        boyer_myrvold_planarity_test
            (boyer_myrvold_params::graph = g,
             boyer_myrvold_params::edge_index_map = edge_index,
             boyer_myrvold_params::embedding = embedding);
        make_maximal_planar(g, embedding, vertex_index, edge_index, vis);
    }

};


void maximal_planar(GraphInterface& gi)
{
    run_action<graph_tool::detail::never_directed, mpl::true_>()
        (gi,
         [&](auto&& graph)
         {
             return do_maximal_planar()
                 (std::forward<decltype(graph)>(graph), gi.get_vertex_index(),
                  gi.get_edge_index());
         })();
}
